@article{SM_1982_43_4_a0,
     author = {A. A. Talalyan},
     title = {On~approximation properties of certain incomplete systems},
     journal = {Sbornik. Mathematics},
     pages = {443--471},
     publisher = {mathdoc},
     volume = {43},
     number = {4},
     year = {1982},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_1982_43_4_a0/}
}